Blended Rate vs WACC — Consumer Debt vs Corporate Capital Structure
Understand the key differences between consumer blended interest rates and corporate Weighted Average Cost of Capital (WACC).
Blended Rate Calculator
Weighted average interest rate across consumer loans
What it measures: The weighted average interest rate across personal debt accounts based on principal balances.
✓ Use when
- Evaluating multi-loan consumer debt consolidation
- Combining first mortgage and HELOC rates
- Calculating aggregate borrowing cost for individuals
✗ Limitations
- Does not account for corporate tax deductibility shields
- Does not weight equity capital
WACC & Blended Debt Calculator
Corporate cost of capital including debt tax shields
What it measures: The blended hurdle rate for a corporation combining equity and after-tax cost of debt.
✓ Use when
- Evaluating corporate acquisitions and M&A deals
- Determining hurdle rates for commercial real estate or corporate projects
- Blending senior notes, term loans, and equity capital
✗ Limitations
- Not applicable to non-business consumer debt
Key difference
Blended rate measures simple weighted interest across personal loans. WACC incorporates market equity costs and corporate debt tax deduction shields.
Worked Example
Scenario
A firm has $5M in debt at 7% (21% tax rate) and $5M in equity at 10% cost.
Consumer Blended Rate = 7.00%
WACC = (50% × 10%) + (50% × 7% × (1 - 0.21)) = 7.765%
Interpretation
WACC accounts for both equity expectation and the interest tax shield.
Bottom line
Use Blended Rate for individual debt management. Use WACC for corporate capital budgeting.